Sand-blast device



Oct. 1, 1929. a P, DAVIS t1,730,195 SAND BLAST `DEVICE Filed June 29, 1928 3 Sheets-Sheet l ,5f P Hav/7l 5 INVENTOR ATTORNEY Oct. l, 1929.

s. P. DAvls 1,730,195

SAND BLAST DEVICE Filed June 29. 1928 3 Sheets-Sheet 2 INVENTOR ATTORNEY Oct. 1, 1929. S P, DAV|S 1,730,195

SAND BLAST DEVICE Filed June 29, 1928 3 Sheets-Sheet 5 gli Patented 0d. 1, 1929 UNITED STATES PATENT ori-lcs` SAMUEL P. DAVIS, 0F SD'JSBEE, TEXAS. ASSIGNOR 0F ONE-FOURTH T0 STERLING F. THOMPSON AND ONE-FOURTH T0 OTTO F. MATTIZA, BOTH OF SILSBE-E, TEXAS SAND-BLAST DEVICE Application filed .Tune 29,

This invention relates to a sand blast apparatus, the general object of the invention being to provide a nozzle arrangement located within the container for the sand, with means for attaching one partl of a nozzle ar; rangement to a supply of compressed air so that the air will force the sand through the outlet part of thev nozzle arrangement and means for introducingcompressed air mto the container when desired. to provide additional means for forcing the sand from the container.

This invention also consists in certain other 'features of construction and in the combination and arrangement of the several parts,

to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detail, reterenee will bc had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure. 1 is a sectional view with parts in elevation of one form of the invention.

Figure 2 is a detail sectional view showing a form of nozzle device for use with paint or the like.

Figure 3 is a view similar to Figure 1, but showing a modification.

Figure 4 is a view showing another modiiication.

In these drawings, the numeral 1 indicates a cylinder or container for holding the sand or other material to be used with the device, the top of the container being provided with an opening which is closed by a plug 2 having l a valve 3 therein. Bushings 4 and 5 are detachably arranged in the sides of the container adjacent the bottom thereof, these bushings being arranged opposite each other. A pipe 6 has one end threaded into the inner part of the bushing 4 and a pipe 7 has one end threaded into the inner part of the bushing 5, these pipes forming a nozzle, with the pipe 7 of much smaller diameter than the pipe 6 and extending into the open end of the pipe 6.

A supply line 8 has a portion threaded into the outer part of the bushing 5 and contains 1928. Serial No. 289,260.

a valve 9 so that the air supply through the l pipe 7 can he controlled, it heilig understood that the line 8 is connected with asuitable source of compressed air. A coupling 10, containing va valve 11, is connected with the outer part of the bushing 4 and a hose 19. is connected with the coupling for leading the sand blast to the point of use. A branch line 13 connects the line 8, beyond the valve, 9, with the bottom of the container or tank 1 and has a valve 14 therein. y

From the foregoing it will be seen that by opening the valves 9 and 11 and closing the valve 14, compressed air will pass through the pipe 7 into the pipe 6 so as to create a suction in the open end of the pipe 6 and thus draw sand into the pipe 6 through the space between the free ends of the pipes 6 and 7 and this sand, with the air, will pass through the coupling l0 into the hose 12 and thus be delivered tothe point of use. In order to in` crease the action of the device or to handle. coarse sand and damp sand, the valve 14 may be opened so as to supply compressed air into the bottom of the tank which will not only act to agitate the sand, but will place the same under pressure and thus force the sand into the pipe 6.

Figure 2 shows an arrangement whereby the pipe 7 is of larger diameter than the pipe 7 and extends into the pipe 6 a less distance than the arrangement shown in Figure 1 so that with this arrangement, paint and the like can be handled by the device.

Figure 3 shows 'a modification in which the pipes and 7 are substituted by a single pipe 15 which is connected with the bushing 5 and passes through the bushing 4 and has perforations 16 therein so that the air flowing through this pipe 15 will draw sand through the perforations. This figure also shows a branch line 17 having a valve 18 therein for connecting the supply line 8 with the top of the tank so that compressed air can be supplied to the top of the tank as well as the bottom thereof to increase the pressure within the tank.

Figure 4 shows another modification in which the nozzle arrangement is similar to that shown in Figures 1 and 2 and in which the branch line 17 enters the side of the tank adjacent the top thereof, with .the supply line 8" arranged out of alignment with the nozzle arrangement. This figure also shows another supply line 19 having a valve 20 therein to supply compressed air to the top of the tank. f

From the foregoing it willibe seen that l have provided means for forcing compressed air through a nozzle device larmnggged within the tank so that sand or the like in the tank will be drawn into the nozzle hy the suction created therein by the air, with means for introducing compressed air into the tank to agitato, the contents thereof and also to place said contents under pressure.

lt is thought from the foregoing description that. the advantages and novel features of my invention will he readily apparent.

It is to he understood that I may make changes in the construction and in the conibinatiou and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

lVhat l claim is A device of the class described comprising a. tank, oppositely arranged bushings in the sides thereof, a nozzle device connected with the inner ends of the bushings and located within the tank, discharge means connected with one of the bushings, a compressed air supplv line connected with the other hushing, a branch line connecting the supply line With the interior of the tank at the hottom thereof for agitating the sand and valves in the branch line. the supply line and the discharge means.

In testimony whereof I affix my signature.

SAMUEL P. DAVIS. 

